The average fuel economy for new vehicles sold in the U.S. in January rose 0.1 mpg to reach 25.1 mpg, according to Michael Sivak and Brandon Schoettle from the University of Michigan's Transportation Research Institute (UMTRI).

The study, which includes window sticker ratings from the U.S. Environmental Protection Agency, also found that the average fuel economy is up 5 mpg from October of 2007 (the first month of monitoring) but down 0.4 mpg from the high of 25.5 mpg from August of 2014.

The University of Michigan’s Eco-Driving Index (EDI), which estimates the average monthly emissions of greenhouse gasses generated by individual U.S. drivers, remained unchanged in October and November of 2016 at a value of 0.83 (the lower the value the better).

The EDI estimated that, compared to October 2007, new-vehicles produced 17% lower emissions. This is 5% higher than the record low for emissions reached in November of 2013.